MEG state dynamics of sentence generation: evidence for a compensatory segmentation mechanism in healthy aging.

Although not robust contributors (|BSR| < 3), we observed a positive trend for cognitive flexibility (TMT B), especially covarying with the brain state temporal organization (BSR temporal = 2.71).

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By contrast, a negative trend was also observed for baseline processing speed (TMT A), especially covarying with spectral dynamics (BSR spectral = −2.92). 3.2.2 Spectral model Age and the associated behavioral profile ( Figure 5 ) covaried with a large-scale redistribution of oscillatory power across states ( Figure 6 ), particularly from the sensorimotor (State 2) and visuo-motor configurations (State 3) toward the states which bind with the higher-level DMN (State 1: semantic control and State 4: posterior right visual).

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